Specifications

ManualsBrandsDanfoss ManualsHousehold Appliances102

Cable-length and cross-section

The frequency converter has been tested with a given

length of cable and a given cross-section of that cable. If

the cross-section is increased, the cable capacitance - and

thus the leakage current - may increase, and the cable

length must be reduced correspondingly. Keep the motor

cable as short as possible to reduce the noise level and

leakage currents.

Switching frequency

When frequency converters are used with Sine-wave filters

to reduce the acoustic noise from a motor, the switching

frequency must be set according to the Sine-wave filter

instruction in 14-01 Switching Frequency.

1. Fasten decoupling plate to the bottom of the

frequency converter with screws and washers

from the accessory bag.

2. Attach motor cable to terminals 96 (U), 97 (V), 98

(W).

3. Connect to earth connection (terminal 99) on

decoupling plate with screws from the accessory

bag.

4. Insert plug connectors 96 (U), 97 (V), 98 (W) (up

to 7.5 kW) and motor cable to terminals labelled

MOTOR.

5. Fasten screened cable to decoupling plate with

screws and washers from the accessory bag.

All types of 3-phase asynchronous standard motors can be

connected to the frequency converter. Normally, small

motors are star-connected (230/400 V, Y). Large motors are

normally delta-connected (400/690 V, Δ). Refer to the

motor name plate for correct connection mode and

voltage.

Procedure

1. Strip a section of the outer cable insulation.

2. Position the stripped wire under the cable clamp

to establish mechanical fixation and electrical

contact between cable screen and ground.

3. Connect ground wire to the nearest grounding

terminal in accordance with grounding

instructions.

4. Connect the 3-phase motor wiring to terminals

96 (U), 97 (V), and 98 (W), see Illustration 6.14.

5. Tighten terminals in accordance with the

information provided in chapter 6.1.1 Torque.

130BD531.10

Illustration 6.14 Motor Connection

130BT333.10

Illustration 6.15 Motor Connection for Enclosure Type B1 and

B2 (IP21/NEMA Type 1, IP55/NEMA Type 12 and IP66/NEMA

Type 4X)

Electrical Installation Design Guide

6 6